Rockauto.com shows 2 different 4-bolt water pumps for my 62 Bonneville. One has a cast impeller and spins clockwise, and the other a steel stamped impeller that spins the other direction. Anyone ever heard of this?
I may be wrong but it seems to me there was a thread on one of the Pontiac groups(1950's Pontiacs maybe)concerning this.If I remember correctly the stamped steel impellers were a screw up and should NOT be used in an engine.Causes the pump to cavitate and screws up the flow.
It could be a screwup. Years ago, a guy came to the parts store where I was employed and complained about the 413 in his motor home that had been overheating ever since he replaced the water pump, and it turned out that the impeller was ass backwards. I ordered another identical pump and it came through with the correct impeller.
I'm thinking no screwup, because it's available AND specified in a few different resources. It specifically shows the difference between impeller design based on the direction of rotation. I'm on a mission to find out
My old General Motors Pontiac parts book lists one water pump from '55-'62, number 540069. See if they can cross reference it.
Here is a good Pontiac site i dont think any of the ponchos i worked on ,and i have one now in a hot rod. I also have a lot of parts w/ engines. The site is psp.aquacomp.net,Its a Pont. Street Peformance,a lot of goodole boys.. Jobob
Groucho, is this an A-1 Cardone unit? If so, I got one with the stamped steel impeller for my '63 and the impeller was backwards. A-1 eventually fixed the problem and issued a new part # for the correct unit. Sent the stamped one back and the replacement I got had a cast impeller with the right curved fins.
Yes, i think so. I don't understand, if it's incorrect, why they show both to be available, and acknowledge the stamped as being reverse rotation
The pump could be for intended 1960 the internal flow was changed in 60 in an attempt for better cooling. In 1961 as you know the engines were revamped and the flow returned to normal but with larger passages.
On later Pontiacs the distance between the divider plate and impeller was too much, greatly reducing effiency. Performance Years forums have a section for cooling with this issue and how to fix...
Does not pertain to my question, or the reverse rotation issue of the pump itself, which is different than where the water's routed.
I was going to offer up some more information on the subject but your "I know everthing but I'm still in need of help attitude" doesn't work with me... Goodluck with that.
So, i'm wrong to try and get "MY" thread back on track in an effort to get my answer? My guess is you're just one more without the info, but just had to get your 2 fucking cents in here somehow. Good luck with "THAT"! PS- I notice you're NEW, and your limited participation here has more to do with WANT ads, or what the HAMB can do for you. Make no mistake, i "AM" a jackass. But i do LOOK for threads that have people in need and try to help whenever i can. According to the people that've contacted me, i've been fairly instrumental in helping others. So, in the future, i'd consider it a huge favor, that if you don't have anything constructive to add to my threads, go bother someone else.
So, you're a self professed fucking KNOW IT ALL? Sorry, but i'm not seeing that HERE. When i was young, i'd go to the older guys for answers. Now, although i don't know EVERYTHING, i do know enough to come to the aid of others more often than not. In a sense, i've become the "guy" that i used to go to when younger. I'm grateful to be in that position. Lots of younger guys call me for answers, and luckily most the time i have them. They call, said it worked, and i feel i'm giving something back. My Pontiac's fixed, and i have no real need for this info except the fact i WANT the info. So, maybe, again, i can help the next guy. PS- i had the pleasure to help a great guy that's answered questions for 30 years for me, and it was pretty cool that i was to him ONCE what he'd been to me too many times
Groucho: Go to the Yahoo group "Pontiac 1950's" and on the search feature on the first page type in "water pump impeller" and it will bring up all the messages about this subject. I didn't read them all but I got the idea that the stamped steel impeller with reverse rotation(clockwise if you're in the driver's seat) is a screw up and should not be used.
I found a story (with no ending or answer) on a 69 Pontiac cast impeller. But, there's no mention (and it's a completely different pump) about reverse rotation.
The Jalopy Journal
